877acb5a8f
- Implemented exercises for array high-order methods, memory and execution, switch statements, and final review. - Added starter and answer files for each exercise to facilitate learning. - Created a runner HTML file to execute JavaScript code and display console outputs. - Updated README files to include exercise objectives, tasks, and usage instructions.
28 lines
707 B
JavaScript
28 lines
707 B
JavaScript
console.log("var 声明前：", lessonType);
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var lessonType = "JavaScript";
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// 如果你取消下面两行注释，会报错，因为 let 在声明前不能访问。
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// console.log("let 声明前：", chapterType);
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// let chapterType = "作用域";
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function compareScope() {
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if (true) {
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var lessonName = "变量";
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let chapterName = "作用域";
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const stage = "进阶";
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console.log("块内：", lessonName, chapterName, stage);
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}
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// 任务：
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// 1. 输出 lessonName
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// 2. 不要直接在这里输出 chapterName，否则会报错
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// 3. 用一句注释说明为什么
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}
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compareScope();
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// 任务：
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// 4. 试着重新给 const 声明的值赋值
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// 5. 观察会发生什么
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